From E-2 onwards, it is possible to acquire the Destroyer Escort / Coastal Defence Ship (DE) Kunashiri as a drop. Also, from E-3 onwards (which requires use of a Combined Fleet), it is possible to acquire the DE Shimushu and the Supply Vessel (AO) Kamoi. The latter can be remodeled into a Seaplane Tender (AV), and does not require use of a Blueprint in order to do so.

Upon clearing E-3, Admirals will be rewarded with the Converted Merchant Aircraft Carrier Kasuga Maru. She starts off as a very weak aircraft carrier, but can eventually be remodeled into a more powerful carrier with her own distinctive strengths.

Her final remodel requires a Prototype Catapult, which can be obtained from the latter half of this event.